Well-packer.



U. S. CAMERON.a

WELL PACKER.

APPL rrrrrrrrrrr ID) 001224, noon.

1 1 08,333m Patented M1525, 19,14.

mvznrron CHARLES S. CAMERON, OF PITTSBURGH, PENNSYLVANIA.

WELL-PACKER.

To all whom it may concern:

Be it known that I, CHARLES S. CAMERON, of Pittsburgh, Allegheny county, Pennsylvania, have invented a new and useful Welllacker, of which the following is a full,

clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure l is a vertical sectional view illustrating my invention; Figs. 2, 3, 4: are de tail sectional views showing portions of'the inner and outer casing members and also diii'erent forms of locking devices; and Fig. 5 is a detail sectional view showing another modification; and Fig. -6 is'a detail view showing a modified form of the driving tool or hammer.

My invention has relation to well packers, and is designed to' provide a simple and efficient form of packer which can be used to shut off water, oil or gas at any desired point within the well, and which can be set by the operation of the string of tools. Heretofore in packers of this character, the weight of the casing has been utilized to set the packer, and it has been necessary to extend the casing to the top of the well.

My invention provides a packer which, enables the casing to be terminated at any desired point within the well, the packer being placed at the upper end of the casing and set by'driving instead of by the action of the casing.

The nature of my invention will be best understood by reference to the accompanying drawings, which will now be described,

it being premised, however, that various changes may be inade in the details of construction and arrangement by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claim.

In the drawings, the numeral 2 designates the usual casing, which extends'upwardly from the bottom of the well to about the point where it is desired to shut oil the oil,

' portion of this casing section is'a sleeve or gas or water. Screwed into theupper end coupling 3, into which is screwed an extension 4 of the casing. The sleeve or coupling 8 also forms at its upper end a seat for the lower end of theexpansible packing sleeve 5, which is seated around the casing extension 4 and between the. sleeve or coupling 3, and an upper driving section 6. The casln extension 4; terminates at its upper .end with- Specification of Letters Patent.

Application filed October 24, 1908.

Patented Aug. 25, 1914. Serial No. 459,330.

in the driving section 6, and is provided w th some form of driving connection with said section. In the form shown in Figs. 1

and 2, the casing extension lis formed with a series of circumferentially extending ratchet-like teeth or corrugations 7, each of which terminates in a square shoulder S at its upper end for engagement with the upper edge of a springpressed dog or catch 9, which is seated in a recess 10 of the driving section '6. When the section 6 is driven downwardly, it will be readily seen that the dog or catch 9 will pass the teeth or corrugations on the casing extension 1, but will immediately engage one of the teeth or corrugations to prevent any backward or up ward movement of the driving section.

In the form shown in Fig. 3, the pawl or catch is in the form of a spring-pressed dog 11, whose nose 12 projects through a recess 13 in the driving section in position to engage the teeth or corrugations on the casing catch is in the form of a serrated wedge 14:,

which is seated in a recess in the casing extension 4, and has sufiicient frictional engagement at its toothed side with the driving section 6 to hold the latter against any return movement.

In the construction shown in Fig. 5, the casing extension 1 is provided with a tapered portion 15, which is designed tobe engaged by a similarly tapered portion 16 at the lower end of the driving section. This form of device depends entirely upon the friction between the two members to hold the driving section against backward or upward movement.

The driving section 6 is operated to set the packing by means of the string of tools.

17 in Fig. 1 designates a portion of the string of tools, and inserted in this string of tools at any desired point is a driving head or hammer 18 which is designed to en gage the upper end of the section 6 as the string of tools are reciprocated in the manner clearly shown in said figure. This driving head or hammer may consist simplyof a collar as shown in Fig. 1, orit may consist of a separate section 19, as shown in Fig. 6, which can be inserted into the string of tools at any desired point.

By reciprocating the string of tools within the well, this driving head or hammer, by successive blows on the lipper end of the driving section 6 afiects the compression of the packing sleeve 5 and expands the same into packing contact with the wall of the well.

The packer can be lowered into the well in any known manner, with the string of casing 2. The packing is reversible end for end, the driving section 6 being for this purpose provided with an interior screwthread at its upper end portion. The packer may, therefore, be placed in the Well with its other end uppermost, the section 6 forming the coupling section with the easing, and the section 3 acting as the driving section.

The advantages of my invention will be apparent to those skilled in the art, since it provides a simple and effective packer which can be placed on top of the casing at any desired point within the welhand set by the operation of the string of tools, thereby obviating the use of all casing above the packer. My invention also obivates the use of all springs for setting the packer, and also the use of anchoring devices of any kind engaging the wall of the well.

It will be obvious that various changes may be made in the details of construction and arrangement of the parts. For instance, any suitable form of holding means may be provided for holding the driving section as it is driven, and various forms of driving heads or hammers adapted for insertion in the connection to the string of tools may be provided.

What I claim is A well packer, comprising a casing extension member, a packing member seated around the same, a coupling member secured to the upper end of the casing and forming a seat for the lower end of the packing member, the lower end of the coupling member forming a driving surface, and a driving member telescoped onto the upper end portion of the extension member and having a driving surface at its upper end, the latter being screw-threaded, and there being a holding down connection between the driving member and the casing extension, said packer being reversible end for end to cause the driving member to become the coupling member, and vice-versa; substantially as described.

In testimony whereof, I have hereunto set my hand.

CHARLES S. CAMERON. 

